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3 years ago

Which shows the equation below written in standard form? 9-7x = (4x-3)2 + 5

Mathematics

1 answer:

Shkiper50 [21]3 years ago

3 0

Answer:

x =(-17-√-31)/-32=(17+i√ 31 )/32= 0.5313-0.1740i

x =(-17+√-31)/-32=(17-i√ 31 )/32= 0.5313+0.1740i

Step-by-step explanation:

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F(x) = 384 + 48x<br> What is the zero of f(x)

frozen [14]

Answer:

its 22 .

Step-by-step explanation:

4 0

4 years ago

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PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!

Nady [450]

Yo sup??

We have to apply trigonometry ie cosine formula

cos44=RS/RQ

RS=RQ*cos44

=7.2

Hope this helps

4 0

3 years ago

A factory makes propeller drive shafts for ships. A quality assurance engineer at the factory needs to estimate the true mean le

borishaifa [10]

Answer:

$1000-1.96\frac{2}{\sqrt{4}}=998.04$

$1000+1.96\frac{2}{\sqrt{4}}=1001.96$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that $z_{\alpha/2}=1.96$

Now we have everything in order to replace into formula (1):

$1000-1.96\frac{2}{\sqrt{4}}=998.04$

$1000+1.96\frac{2}{\sqrt{4}}=1001.96$

5 0

3 years ago

Adam traveled out of town for a regional basketball tournament. He drove at a steady speed of 72.4 miles per hour for 4.62 hours

Anastaziya [24]

Answer:

334.488

Step-by-step explanation:

I used a calculator lol

8 0

3 years ago

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(-4, 7), (-6,-4)<br><br> find the slope of the line through each pair of points

HACTEHA [7]

Answer:

slope = 11/2

Step-by-step explanation:

If you are given two points, you can find the slope using the point-slope equation. The equation looks like this:

y₁ - y₂ = m(x₁ - x₂)

In this form, "m" represents the slope, "x₁" and "y₁" represent the values from one point, and "x₂" and "y₂" represent the values from the other point. You can plug the values from the points into the equation and simplify to find the slope.

Point 1: (-4, 7) Point 2: (-6, -4)

x₁ = -4 x₂ = -6

y₁ = 7 y₂ = -4

y₁ - y₂ = m(x₁ - x₂) <----- Point-slope form

7 - (-4) = m(-4 - (-6)) <----- Insert values

11 = m(2) <----- Simplify

11/2 = m <----- Divide both sides by 2

5 0

2 years ago

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